Wideband
In communications, wideband is a relative term used to describe a wide range of frequencies in a spectrum. A system is typically described as wideband if the message bandwidth significantly exceeds the channel's coherence bandwidth. Some communication links have such a high data rate that they are forced to use a wide bandwidth; other links may have relatively low data rates, but deliberately use a wider bandwidth than "necessary" for that data rate in order to gain other advantages; see spread spectrum.
A wideband antenna is one with approximately or exactly the same operating characteristics over a very wide passband. It is distinguished from broadband antennas, where the passband is large, but the gain and/or pattern need not stay the same over the passband.
The term Wideband Audio or (also termed HD Voice or Wideband Voice) denotes a telephone conversation using a wideband codec, which uses a greater frequency range of the audio spectrum than conventional voiceband telephone calls, resulting in a clearer sound.
According to the United States Patent and Trademark Office, WIDEBAND is a registered trademark [1] of WideBand Corporation, a USA based manufacturer of Gigabit Ethernet managed switches, adapters, and networking equipment. [2]
In some contexts wideband is distinguished from broadband in being broader. [3]
[edit] External links
- WideBand Corporation
- Unofficial USAF Satellite, Wideband and Telemetry Communications Career Field Page
[edit] See also
[edit] References
- ^ "US Trademark Search". United States Patent and Trademark Office. http://www.uspto.gov/main/trademarks.htm. Retrieved 2008-10-08.
- ^ "WideBand Corporation web site". WideBand Corporation. https://www.wband.com. Retrieved 2009-03-04.
- ^ Forester research Shift from broadband to wideband
